Is it weird to still have feelings for someone after 10+ years have passed?

I still feel like I have feelings (I logically know it's not true) for a guy I haven't been involved with in nearly 10 years. For instance, he liked something of mine on Twitter, and I still felt weird butterflies.

We live hours apart and he's married now, so it's not like I actually want something to happen... its involuntary. But it's still kind of a strong reaction.